Holt Renfrew & Co. management is not sitting idly by folding cashmere sweaters while U.S. competitors Saks and Nordstrom roll into Canada over the next two years. Canada’s biggest luxury retailer, in the midst of expanding its retail footprint by 40% by 2015, just announced it will open its first men’s standalone store in Toronto this fall beside Harry Rosen on the city’s tony Bloor St. strip. FP retail reporter Hollie Shaw spoke with Holts president Mark Derbyshire at the launch of the retailer’s newly expanded Yorkdale store in the city’s north end about the looming luxury war, the importance of superior customer service, and the long-awaited launch of the company’s e-commerce website.